13251002500 has 60 divisors (see below), whose sum is σ = 29025243324. Its totient is φ = 5291632000.

The previous prime is 13251002491. The next prime is 13251002543. The reversal of 13251002500 is 520015231.

It can be written as a sum of positive squares in 10 ways, for example, as 9059993856 + 4191008644 = 95184^2 + 64738^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1628442 + ... + 1636558.

Almost surely, 2^13251002500 is an apocalyptic number.

13251002500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13251002500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14512621662).

13251002500 is an abundant number, since it is smaller than the sum of its proper divisors (15774240824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13251002500 is an equidigital number, since it uses as much as digits as its factorization.

13251002500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8794 (or 8777 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 13251002500 its reverse (520015231), we get a palindrome (13771017731).

The spelling of 13251002500 in words is "thirteen billion, two hundred fifty-one million, two thousand, five hundred".